Air pump



FIG. 1 is a top-front perspective view of an air pump showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a right side view thereof, a left side view being a mirror image of the right side view;

FIG. 5 is a bottom view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom-left perspective view thereof.

The broken lines illustrate portions of the air pump that form no part of the claimed design. 

CLAIM The ornamental design for an air pump, as shown and described. 